Review on J-B Weld ExtremeHeat High Temperature Resistant Metallic Paste - 3 oz by Jason Mitts

Used this to repair a cracked '97 Nissan hardbody exhaust manifold. Availability wasn't great so it was a bit difficult to distribute the way I wanted and I worked on it for too long after it started freezing. It looked pretty rough but was still leaking when finished to the point where it didn't look like a complete hack anymore. I've put just over 1000 miles on the repair so far and haven't removed the heat shield to check but I can't hear it on start up like I did before the repair so I think it's still holding up. Other reviews mentioned that mixing properly was key, so I bent some wire and put it in the drill to mix. Probably not as good as a new header, but definitely worth the price, especially if it lasts another 100,000 miles.